CN110583086A

CN110583086A - Admission-free control of shared channels

Info

Publication number: CN110583086A
Application number: CN201880028864.0A
Authority: CN
Inventors: 黄轶; J·孙; 蒋靖
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2017-05-04
Filing date: 2018-04-25
Publication date: 2019-12-17
Anticipated expiration: 2038-04-25
Also published as: US10779222B2; EP3620017A1; WO2018204148A1; CN110583086B; EP3620017B1; US20180324676A1; TW201844015A

Abstract

Systems, methods, and devices for wireless communication are described for grant-less admission control of a shared channel. The base station may select an admission control parameter from a set of admission control parameters, the selected admission control parameter setting a grant-less access threshold for determining eligibility for obtaining grant-less access to resources of the shared channel. The base station may transmit selected admission control parameters to configure a User Equipment (UE) with an grantless access threshold. The UE may receive an admission control parameter from the base station and set a grantless access threshold based at least in part on the admission control parameter. The UE may determine eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and communicate with the base station based at least in part on the determined qualification.

Description

Admission-free control of shared channels

Cross-referencing

This patent application claims priority from U.S. provisional patent application No.62/501,641 entitled "Grant-Free administration Control to a Shared Channel" filed by Huang et al on 2017, month 5 and 4, and U.S. patent application No.15/895,388 entitled "Grant-Free administration Control to a Shared Channel" filed by Huang et al on 2018, month 2 and day 13, each of which has been assigned to the assignee of the present application.

Technical Field

The following relates generally to wireless communications, and more specifically to grant-less admission control for shared channels.

Background

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems (e.g., Long Term Evolution (LTE) systems, or New Radio (NR) systems). A wireless multiple-access communication system may include multiple base stations or access network nodes, each supporting communication for multiple communication devices (which may otherwise be referred to as User Equipment (UE)) simultaneously.

a wireless multiple-access communication system may include multiple base stations, each of which simultaneously supports communication with multiple UEs. A base station may communicate with a UE on downlink channels (e.g., for transmissions from the base station to the UE) and uplink channels (e.g., for transmissions from the UE to the base station). Some communication modes may enable communication between a base station and a UE, over a shared radio frequency spectrum band, or over different radio frequency spectrum bands (e.g., a dedicated radio frequency spectrum band and a shared radio frequency spectrum band). With increased data traffic in cellular networks using dedicated radio frequency spectrum bands, offloading at least some data traffic to the shared radio frequency spectrum band may provide Mobile Network Operators (MNOs) (or cellular operators) with opportunities for enhanced data transmission capacity. The use of the shared radio frequency spectrum band may also provide services in areas where access to the dedicated radio frequency spectrum band is unavailable.

Disclosure of Invention

The described technology relates to improved methods, systems, devices or apparatus that support grantless admission control of shared channels. In general, described techniques provide for setting a grant-less access threshold to enable a User Equipment (UE) to determine its eligibility for transmitting in a shared data channel. The base station may perform an admission control scheme and monitor data collisions to adjust an admission exempt access threshold to control the eligibility of one or more UEs for admission exempt access to the shared channel resource. The base station may select an admission control parameter from a set of admission control parameters to set a no-admission access threshold. The base station may send the selected admission control parameters to the UE to configure the UE with an admission exempt access threshold. The UE may determine its eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and communicate with the base station based at least in part on its determined eligibility.

A method of wireless communication is described. The method can comprise the following steps: selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining granualtion of a resource of a shared channel; and transmitting the selected admission control parameters to configure the UE with the grantless access threshold.

An apparatus for wireless communication is described. The apparatus may include: means for selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining grantless access to resources of a shared channel; and means for transmitting the selected admission control parameter to configure the UE with an admission exempt access threshold.

Another apparatus for wireless communication is described. The apparatus may include: a processor; a memory in electronic communication with the processor; and instructions stored in the memory. The instructions may be operable to cause the processor to: selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining granualtion of a resource of a shared channel; and transmitting the selected admission control parameters to configure the UE with the grantless access threshold.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining granualtion of a resource of a shared channel; and transmitting the selected admission control parameters to configure the UE with the grantless access threshold.

in some examples of the above methods, apparatus, and non-transitory computer-readable media, selecting the admission control parameter comprises: a collision rate within resources of the shared channel is detected, wherein the selected admission control parameter may be based at least in part on the detected collision rate.

in some examples of the above methods, apparatus, and non-transitory computer readable media, detecting the collision rate comprises: a ratio is determined at which an energy level within resources of the shared channel exceeds an energy threshold.

Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for detecting collision rates within resources of a shared channel. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, units, or instructions for adjusting an entry control parameter based at least in part on a detected collision rate. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, units, or instructions for transmitting the adjusted admission control parameters to configure the UE with the adjusted admission control parameters.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, the selected admission control parameter increases or decreases the grant-less access threshold. In some examples of the above methods, apparatus, and non-transitory computer-readable media, the grant-exempt access threshold prevents the UE from accessing at least some of the resources of the shared channel. In some examples of the above methods, apparatus, and non-transitory computer-readable media, the grant-exempt access threshold allows the UE to access at least some of the resources of the shared channel.

in some examples of the above methods, apparatus, and non-transitory computer-readable media, transmitting the selected admission control parameter further comprises: the selected admission control parameters are transmitted on a common control channel. In some examples of the above methods, apparatus, and non-transitory computer-readable media, the common control channel may be common to a group of UEs that includes the UE. In some examples of the above methods, apparatus, and non-transitory computer-readable media, the selected admission control parameter configures each UE within the group of UEs with a grant-free access threshold.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, transmitting the selected admission control parameter further comprises: the selected admission control parameter is transmitted in a common control channel conveying a slot format indication or in a different common control channel.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, transmitting the selected admission control parameter further comprises: the selected admission control parameters are transmitted in a control element. In some examples of the above methods, apparatus, and non-transitory computer-readable media, transmitting the selected admission control parameter further comprises: the selected admission control parameter is transmitted using radio resource control signaling.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, the selected admission control parameter includes at least one bit. In some examples of the above methods, apparatus, and non-transitory computer-readable media, the plurality of admission control parameters correspond to a plurality of different access thresholds.

Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for selecting a priority level for a UE from a plurality of priority levels. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for transmitting the selected priority level to the UE.

some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for determining a service level for a UE from a plurality of service levels. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, units, or instructions for transmitting the determined level of service to the UE.

a method of wireless communication is described. The method can comprise the following steps: receiving an admission control parameter from a base station; setting a grant-exempt access threshold based at least in part on the admission control parameter; determining eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and communicate with the base station based at least in part on the determined qualification.

An apparatus for wireless communication is described. The apparatus may include: means for receiving admission control parameters from a base station; means for setting a grant-exempt access threshold based at least in part on an admission control parameter; means for determining eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and means for communicating with the base station based at least in part on the determined eligibility.

another apparatus for wireless communication is described. The apparatus may include: a processor; a memory in electronic communication with the processor; and instructions stored in the memory. The instructions are operable to cause the processor to: receiving an admission control parameter from a base station; setting a grant-exempt access threshold based at least in part on the admission control parameter; determining eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and communicate with the base station based at least in part on the determined qualification.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: receiving an admission control parameter from a base station; setting a grant-exempt access threshold based at least in part on the admission control parameter; determining eligibility for obtaining grantless access to resources of a shared channel based at least in part on a grantless access threshold; and communicate with the base station based at least in part on the determined qualification.

in some examples of the above methods, apparatus, and non-transitory computer-readable media, determining eligibility for obtaining grant-free access to resources of a shared channel comprises: a priority level of a plurality of priority levels is received from a base station. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for comparing the priority level to a grant-less access threshold.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, determining eligibility for obtaining grant-free access to resources of a shared channel comprises: a random number is determined. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for comparing the random number to the grant-less access threshold.

In some examples of the above methods, apparatus, and non-transitory computer-readable media, determining the random number comprises: a service level of a plurality of service levels is determined. Some examples of the above methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, or instructions for generating a random number based at least in part on the determined level of service.

drawings

Fig. 1 illustrates an example of a system for wireless communication supporting admission-exempt control of a shared channel in accordance with aspects of the present disclosure.

Fig. 2 illustrates an example of a wireless communication system that supports grantless admission control of a shared channel in accordance with aspects of the present disclosure.

Fig. 3 illustrates an example of a Transmission Time Interval (TTI) structure that supports grant-free admission control of a shared channel in accordance with an aspect of the present disclosure.

fig. 4 illustrates an example of a process flow diagram for supporting grant-less admission control for a shared channel in accordance with an aspect of the present disclosure.

Fig. 5 illustrates an example of an uplink sub-TTI supporting grant-free admission control of a shared channel, in accordance with aspects of the present disclosure.

Fig. 6 illustrates an example of a downlink sub-TTI supporting grant-free admission control of a shared channel, in accordance with an aspect of the present disclosure.

Fig. 7-9 illustrate block diagrams of apparatuses that support grantless admission control of a shared channel, in accordance with aspects of the present disclosure.

Fig. 10 illustrates a block diagram of a system including a base station that supports admission control of shared channels, in accordance with an aspect of the disclosure.

Fig. 11-13 illustrate block diagrams of apparatuses that support grantless admission control of a shared channel, in accordance with aspects of the present disclosure.

Fig. 14 illustrates a block diagram of a system including a UE that supports admission control of a shared channel without admission, in accordance with an aspect of the disclosure.

Fig. 15-18 illustrate a method for grantless admission control of a shared channel in accordance with aspects of the present disclosure.

Detailed Description

The described technology relates to improved methods, systems, devices or apparatus that support grantless admission control of shared channels. A Mobile Network Operator (MNO) (or cellular operator) may use a radio frequency spectrum shared by multiple User Equipments (UEs) to enhance data transmission capacity. In some conventional techniques, a UE may identify data to transmit and perform a Scheduling Request (SR) procedure with a base station. In the SR procedure, the UE may request the base station to allocate time and frequency resources within a Physical Uplink Shared Channel (PUSCH) that the UE may use to send uplink transmissions. To initiate the SR procedure, the UE may transmit an SR requesting the base station to allocate resources of the PUSCH to the UE. The base station may receive the SR and send a request to the UE requesting the UE to generate a Buffer Status Report (BSR) and/or a Power Headroom Report (PHR). The BSR may indicate how much data to send has been buffered by the UE, and the PHR may indicate how much remaining transmission power the UE has to use, in addition to any power the UE is using for other transmissions. The UE may transmit a BSR and a PHR to the base station. The base station may process the BSR and the PHR and transmit an Uplink (UL) grant to the UE allocating PUSCH resources to the UE. The UE may then transmit within the allocated PUSCH resources.

One problem with conventional techniques is that the SR process may take too long to complete and may not meet the delay requirements for low-delay communication systems, such as ultra-reliable low-delay communication (URLLC) systems. One conventional solution to this problem is to configure the UE with periodic PUSCH resources over time (e.g., in multiple subframes); when the UE has data to transmit, the UE may transmit within periodic PUSCH resources without performing an SR procedure. Such a solution may be problematic because it may waste PUSCH resources, especially when the UE only transmits data infrequently within periodic PUSCH resources. Another conventional solution configures multiple UEs with the same periodic PUSCH resources, and any of the UEs may transmit within the periodic PUSCH resources without performing an SR procedure. This solution is problematic because data collisions may occur frequently when multiple UEs attempt to transmit within the same PUSCH resource.

In contrast to such conventional solutions, the example admission control schemes described herein provide grant-free access to resources of an uplink shared channel. For example, the base station may monitor data collisions and adjust the grantless access threshold to control which UEs are eligible for grantless access to the shared channel resource.

Aspects of the present disclosure are first described in the context of a wireless communication system. The wireless communication system may select admission control parameters that set a threshold for admission exempt access that determines eligibility for admission exempt access to resources of the shared uplink channel. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow charts related to admission control of shared channels without admission.

Fig. 1 illustrates an example of a wireless communication system 100 in accordance with various aspects of the present disclosure. The wireless communication system 100 includes base stations 105, UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE), LTE-advanced (LTE-a) network, or a New Radio (NR) network. In some cases, wireless communication system 100 may support enhanced broadband communications, ultra-reliable (i.e., mission critical) communications, low latency communications, and communications with low cost and low complexity devices.

The base station 105 may select an admission control parameter from a set of admission control parameters, the selected admission control parameter setting a threshold for grantless access. The grantless access threshold may govern the eligibility of the UE to gain grantless access to resources of the uplink shared channel. In some cases, the base station 105 may monitor a collision rate within resources of the uplink shared channel and adjust the admission control parameters to increase or decrease the grantless access threshold. The base station 105 may transmit the selected admission control parameters to configure one or more UEs 115 with an grantless access threshold. Each UE115 may determine its eligibility for grantless access to resources of an uplink shared channel based at least in part on a grantless access threshold; and may communicate with the base station 105 based at least in part on its determined eligibility.

the base station 105 may wirelessly communicate with the UE115 via one or more base station antennas. Each base station 105 may provide communication coverage for a respective geographic coverage area 110. The communication links 125 shown in the wireless communication system 100 may include uplink transmissions from the UEs 115 to the base stations 105 or downlink transmissions from the base stations 105 to the UEs 115. Control information and data may be multiplexed on an uplink channel or a downlink according to various techniques. The control information and data may be multiplexed on the downlink channel using, for example, Time Division Multiplexing (TDM) techniques, Frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, control information transmitted during a Transmission Time Interval (TTI) of a downlink channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region and one or more UE-specific control regions).

UEs 115 may be dispersed throughout wireless communication system 100, and each UE115 may be stationary or mobile. The UE115 may also be referred to as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. The UE115 may also be a cellular phone, a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a personal electronic device, a handheld device, a personal computer, a Wireless Local Loop (WLL) station, an internet of things (IoT) device, an internet of things (IoE) device, a Machine Type Communication (MTC) device, an appliance, an automobile, and so forth.

In some cases, the UE115 may also be able to communicate directly with other UEs (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UEs 115 in the group of UEs 115 communicating with D2D may be within the coverage area 110 of the cell. Other UEs 115 in such a packet may be outside the coverage area 110 of the cell or otherwise unable to receive transmissions from the base station 105. In some cases, a group of UEs 115 communicating via D2D may use a one-to-many (1: M) system, where each UE115 transmits to every other UE115 in the group. In some cases, the base station 105 facilitates scheduling of resources for D2D communication. In other cases, the D2D communication is performed independently of the base station 105.

some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide automated communication between machines, i.e., machine-to-machine (M2M) communication. M2M or MTC may refer to data communication techniques that allow devices to communicate with each other or with a base station without human intervention. For example, M2M or MTC may refer to communications from devices that integrate sensors or meters for measuring or capturing information, and relaying the information to a central server or application that can utilize the information or present the information to a person interacting with the program or application. Some UEs 115 may be designed to gather information or implement automated behavior of a machine. Examples of applications for MTC devices include smart meters, inventory monitoring, water level monitoring, device monitoring, healthcare monitoring, wildlife monitoring, meteorological and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

In some cases, MTC devices may operate using half-duplex (one-way) communications at a reduced peak rate. MTC devices may also be configured to enter a power saving "deep sleep" mode when not engaged in active communication. In some cases, MTC or IoT devices may be designed to support mission critical functions, and wireless communication systems may be configured to provide ultra-reliable communication for these functions.

The base stations 105 may communicate with the core network 130 and with each other. For example, the base station 105 may be connected with the core network 130 through a backhaul link 132 (e.g., S1, etc.). The base stations 105 may communicate with each other directly or indirectly (e.g., through the core network 130) over a backhaul link 134 (e.g., X2, etc.). The base station 105 may perform radio configuration and scheduling for communication with the UE115 or may operate under the control of a base station controller (not shown). In some examples, the base station 105 may be a macro cell, a small cell, a hot spot, and so on. The base station 105 may also be referred to as an evolved node b (enb) 105.

The base station 105 may be connected to the core network 130 by an S1 interface. The core network may be an Evolved Packet Core (EPC) that may include at least one Mobility Management Entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may be a control node that handles signaling between the UE115 and the EPC. All user Internet Protocol (IP) packets may be transported through the S-GW, which may itself be connected to the P-GW. The P-GW may provide IP address assignment as well as other functions. The P-GW may be connected to network operator IP services. Operator IP services may include the internet, intranets, IP Multimedia Subsystem (IMS), and Packet Switched (PS) streaming services.

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the network devices, such as base stations 105, may include subcomponents, such as access network entities, which may be examples of Access Node Controllers (ANCs). Each access network entity may communicate with several UEs 115 through a plurality of other access network transport entities, each of which may be an example of a smart radio head or a transmission/reception point (TRP). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or incorporated into a single network device (e.g., base station 105).

The wireless communication system 100 may operate in the Ultra High Frequency (UHF) frequency region using a frequency band from 700MHz to 2600MHz (2.6GHz), but some networks, such as Wireless Local Area Networks (WLANs), may use frequencies up to 4 GHz. This region may also be referred to as a decimeter band, since the wavelength range is from about one decimeter to one meter in length. UHF waves may propagate primarily in line of sight and may be blocked by building and environmental features. However, the waves may penetrate the wall sufficiently to provide service to the UE115 located indoors. UHF-wave transmission is characterized by smaller antennas and shorter distances (e.g., less than 100km) than transmission of smaller frequencies (and longer waves) using the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum. In some cases, wireless communication system 100 may also utilize the Extremely High Frequency (EHF) portion of the spectrum (e.g., from 30GHz to 300 GHz). This region may also be referred to as a millimeter band because wavelengths range from about one millimeter to one centimeter in length. Thus, EHF antennas may be even smaller and spaced closer together than UHF antennas. In some cases, this may facilitate the use of antenna arrays (e.g., for directional beamforming) within the UE 115. However, EHF transmissions may experience greater atmospheric attenuation and shorter distances than UHF transmissions.

thus, the wireless communication system 100 may support millimeter wave (mmW) communication between the UE115 and the base station 105. Devices operating in the mmW or EHF bands may have multiple antennas to allow beamforming. That is, the base station 105 may use multiple antennas or antenna arrays for beamforming operations for directional communication with the UE 115. Beamforming, which may also be referred to as spatial filtering or directional transmission, is a signal processing technique that a transmitter (e.g., base station 105) may use to beamform and/or steer an entire antenna in the direction of a target receiver (e.g., UE 115). This may be achieved by combining elements in an antenna array in such a way that signals transmitted at a particular angle experience constructive interference while other signals experience destructive interference.

a multiple-input multiple-output (MIMO) wireless system uses a transmission scheme between a transmitter (e.g., base station 105) and a receiver (e.g., UE 115), both equipped with multiple antennas. Portions of the wireless communication system 100 may use beamforming. For example, the base station 105 may have an antenna array with several rows and several columns of antenna ports that the base station 105 may use for beamforming in its communication with the UEs 115. The signal may be sent multiple times in different directions (e.g., each transmission may be beamformed differently). When a mmW receiver (e.g., UE 115) receives a synchronization signal, multiple beams (e.g., antenna sub-arrays) may be attempted.

In some cases, the antennas of a base station 105 or UE115 may be located within one or more antenna arrays, which may support beamforming or MIMO operation. One or more base station antennas or antenna arrays may be collocated at an antenna component, such as an antenna tower. In some cases, the antennas or antenna arrays associated with the base station 105 may be located at different geographic locations. The base station 105 may use the antenna or antenna array multiple times for beamforming operations for directional communications with the UE 115.

In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. In some cases the Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate on logical channels. A Medium Access Control (MAC) layer may perform priority processing and multiplexing of logical channels into transport channels. The MAC layer may also use hybrid arq (harq) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide for the establishment, configuration, and maintenance of RRC connections between the UE115 and network devices, base stations 105, or core network 130 supporting radio bearers for user plane data. At the Physical (PHY) layer, transport channels may be mapped to physical channels.

The time interval in LTE or NR may be in a basic time unit (which may be T)_sA sample period of 1/30,720,000 seconds). The time resource may be in terms of 10ms (T)_f＝307200T_s) May be organized by radio frames of a length that may be identified by System Frame Numbers (SFNs) ranging from 0 to 1023. Each frame may include ten 1ms subframes numbered from 0 to 9. The sub-frame may be further divided into two 0.5ms slots, each of which contains 6 or 7 modulation symbol periods (depending on the length of the cyclic prefix appended before each symbol). Each symbol contains 2048 sample periods in addition to the cyclic prefix. In some cases, the subframe may bethe smallest scheduling unit, also referred to as TTI. In other cases, the TTI may be shorter than the subframe, or may be dynamically selected (e.g., in a shorter TTI burst or in a selected component carrier using a shorter TTI).

a resource element may consist of one symbol period and one subcarrier (e.g., 15KHz frequency range). A resource block may contain 12 consecutive subcarriers in the frequency domain and, for a normal cyclic prefix in each OFDM symbol, 7 consecutive OFDM symbols or 84 resource elements in the time domain (1 slot). The number of bits carried by each resource element may depend on the modulation scheme (the configuration of symbols that may be selected during each symbol period). Thus, the more resource blocks the UE receives and the higher the modulation scheme, the higher the data rate may be.

The wireless communication system 100 may support operation over multiple cells or carriers, a feature that may be referred to as Carrier Aggregation (CA) or multi-carrier operation. The carriers may also be referred to as Component Carriers (CCs), layers, channels, and so on. The terms "carrier," "component carrier," "cell," and "channel" may be used interchangeably herein. A UE115 may be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation may be used with FDD and TDD component carriers.

In some cases, the wireless communication system 100 may use an enhanced component carrier (eCC). An eCC may be characterized by one or more features, including: a wider bandwidth, a shorter symbol duration, a shorter Transmission Time Interval (TTI), and a modified control channel configuration. In some cases, an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have sub-optimal or non-ideal backhaul links). An eCC may also be configured for use in unlicensed spectrum or shared spectrum (where more than one operator is allowed to use the spectrum). An eCC characterized by a wider bandwidth may include one or more segments that may be used by UEs 115 that are not able to monitor the entire bandwidth or prefer to use a limited bandwidth (e.g., to conserve power).

In some cases, an eCC may use a symbol duration different from other CCs, which may include the use of a reduced symbol duration than the symbol durations of other CCs. Shorter symbol durations are associated with increased subcarrier spacing. Devices using an eCC, such as UE115 or base station 105, may transmit wideband signals (e.g., 20MHz, 40MHz, 60MHz, 80MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). A TTI in an eCC may consist of one or more symbols. In some cases, the TTI duration (i.e., the number of symbols in a TTI) may be variable.

A shared radio frequency spectrum band may be used in an NR shared spectrum system. For example, NR shared spectrum may use any combination of licensed, shared, and unlicensed spectrum, among others. Flexibility in eCC symbol duration and subcarrier spacing may allow for the use of eccs across multiple spectra. In some examples, NR shared spectrum may increase spectrum utilization and spectral efficiency, particularly through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

In some cases, wireless system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless system 100 may use LTE licensed assisted access (LTE-LAA) or LTE unlicensed (LTE U) radio access technology or NR technology in unlicensed frequency bands such as the 5GHz industrial, scientific, and medical (ISM) band. When operating in the unlicensed radio frequency spectrum band, wireless devices such as base stations 105 and UEs 115 may use a Listen Before Talk (LBT) procedure to ensure that the channel is free before transmitting data. In some cases, operation in the unlicensed band may be configured based on CA in conjunction with CCs operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, or both. Duplexing in the unlicensed spectrum may be based on Frequency Division Duplexing (FDD), Time Division Duplexing (TDD), or a combination of both.

The example admission control schemes described herein provide grant-free access to resources of an uplink shared channel. For example, the base station 105 may monitor data collisions and adjust the grantless access threshold to control which UEs served by the base station 105 are eligible for grantless access to the uplink shared channel resource.

Fig. 2 illustrates an example of a wireless communication system 200 that supports grantless admission control of a shared channel in accordance with various aspects of the disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. The wireless communication system 200 includes a base station 105-a and a plurality of UEs 115-a, 115-b, which may be examples of aspects of corresponding devices as described above with reference to fig. 1. Although in the example of fig. 2, the wireless communication system 200 may operate in accordance with a RAT, such as LTE, 5G, or a New Radio (NR) Radio Access Technology (RAT), the techniques described herein may be applied to any RAT and systems that may concurrently use two or more different RATs.

The UE115-a may communicate with the base station 105-a via a communication link 125-a, and the UE 115-b may communicate with the base station 105-a via a communication link 125-n. As described with reference to fig. 1, in some cases, a base station 105-a may allocate TTIs that include time and frequency resources for uplink and downlink transmissions and use the TTIs to communicate with one or more UEs. In some cases, the base station 105-a may transmit using mmW frequencies.

Fig. 3 illustrates an example of a TTI structure 300 that supports grant-free admission control of a shared channel in accordance with various aspects of the disclosure. The transmission timeline may be divided into units referred to herein as TTIs. Depicted as TTI t-1, TTI t, and TTI t + 1. Each TTI 305 may have a defined duration (e.g., 10 milliseconds (ms)) and may be divided into a defined number of sub-TTIs 310 with corresponding indices (e.g., 10 sub-TTIs with indices of 0 through 9). An example of a TTI is a frame having a duration of 10ms, and an example of a sub-TTI is a subframe having a duration of 1 ms. The sub-TTI 310 may be used for uplink or downlink communications. In uplink communications, the UE115 transmits to the base station 105. In downlink communications, the base station 105 transmits to the UE 115. Each sub-TTI 310 may include two slots, and each slot may include L symbol periods, e.g., 7 symbol periods for a normal cyclic prefix, or 6 symbol periods for an extended cyclic prefix. Indices of 0 to 2L-1 may be allocated to 2L symbol periods in each sub-TTI.

The available time and frequency resources of each sub-TTI 310 may be divided into Resource Blocks (RBs). In the depicted example, the sub-TTI 310 includes 6 to 100 RBs. Each resource block may cover N subcarriers (e.g., 12 subcarriers) in one slot. In each symbol period, multiple resource elements may be available. Each Resource Element (RE) may cover one subcarrier in one symbol period and may be used to transmit one modulation symbol. Resource elements not used for reference signals in each symbol period may be arranged into Resource Element Groups (REGs). Each REG may include four resource elements in one symbol period. In an example, the slots of the sub-TTI 310 may be divided into a group common control channel 315 and a shared channel 320.

The group common control channel 315 may correspond to a predetermined number of symbol periods of the slot pair, and the shared channel 320 may correspond to the symbol periods of the remainder of the slot pair. In an example, the group common control channel 315 may be a group common Physical Downlink Control Channel (PDCCH). The common control channel 315 may transmit one or more grants that allocate some or all of the resources of the shared channel 320 to one or more UEs 115. The shared channel 320 may be an uplink shared channel (e.g., PUSCH) or a downlink shared channel (e.g., Physical Downlink Shared Channel (PDSCH)).

In some conventional techniques, the UE115 may identify data to transmit and perform an SR procedure with the base station 105 to obtain resources within the shared channel. A problem with conventional techniques is that they may take too long to complete and may not meet the delay requirements of low-delay communication systems, such as ultra-reliable low-delay communication (URLLC) systems. Such conventional solutions to the problem may be insufficient because they may waste shared channel resources, may have too many collisions within the shared channel resources, or both.

The example admission control schemes described herein provide grant-free access to resources of a shared channel. For example, the base station 105 may monitor data collisions and adjust the grantless access threshold to control which UEs are eligible for grantless access to the shared channel resource. Fig. 4 illustrates an example of a process 400 for supporting grant-less admission control for a shared channel in accordance with various aspects of the present disclosure. In process 400, a UE115-a may establish a connection with a base station 105-a.

At 420, the base station 105-a may select an admission control parameter from a set of admission control parameters. The selected admission control parameter may set a threshold for grantless access, and the threshold may control the eligibility of the UE115-a for grantless access to the resources of the shared channel 320.

The base station 105-a may monitor resources of the shared channel 320 for data collisions and may select and/or adjust the grant-less access threshold based on the detected data collisions. In some examples, base station 105-a may include collision detector component 930, as further described in fig. 9. Collision detector component 930 may monitor the REs, RBs, carriers, etc. of shared channel 320 for collisions. In one example, collision detector component 930 can determine that a collision has occurred if collision detector component 930 senses that the energy level of a particular carrier exceeds an energy threshold within a particular symbol period or set of symbol periods, but that base station 105-a is unable to successfully decode data from the symbol period. The combination of sensing that the energy level exceeds the threshold and being unable to successfully decode data from the symbol period may indicate to base station 105-a: multiple UEs 115 have transmitted simultaneously during the same symbol period using the same carrier. The base station 105-a may thus determine that a collision occurred within a symbol period. The base station 105-a may determine a collision rate that is a function of a number of collisions detected within the resources of the shared channel 320 within a defined amount of time (e.g., a defined number of symbol periods, slots, subframes, frames, sub-TTIs, etc.).

The base station 105-a may select an admission control parameter based on the collision rate. The selected admission control parameters may set a threshold of grantless access for one or more UEs 115. The base station 105-a may adjust the admission control parameters to increase the threshold for grantless access when collisions within the resources of the shared channel 320 are frequently detected and to decrease the threshold for grantless access when collisions with the shared channel 320 are infrequently detected.

In an example, the admission control parameter may be a single bit. If the collision rate satisfies a threshold (e.g., is less than the threshold), the base station 105-a may select a first bit value for the admission control parameter (e.g., may set the bit value to '1'). The first bit value may correspond to a grant-less access threshold where some or all of the UEs 115 are eligible for grant-less access to resources of the shared channel 320. Any eligible UE115 with data to transmit may transmit data within the next (or subsequent) sub-TTI that includes the uplink shared channel without first performing an SR procedure.

if the collision rate does not satisfy the threshold (e.g., meets or exceeds the threshold), the base station 105-a may select a second bit value for the admission control parameter (e.g., may set the bit value to '0'). The second bit value may correspond to a grant-free access threshold where no UE115 is eligible for grant-free access to resources of the shared channel 320. Thus, any UE115 with data to transmit may not be provided with grant-free access for transmitting data in the next sub-TTI including the uplink shared channel, but may instead require that an SR procedure be performed first before transmission. For example, the base station 105-a may send a grant to the UE115 in the group common control channel 315 for the sub-TTI that allocates resources of the shared channel within the sub-TTI 310. The UE115 may process the grant and then transmit within the allocated resources.

In another example, the admission control parameter may be two or more bits. The base station 105-a may select a bit value for the admission control parameter based at least in part on a range in which the detected collision rate falls. In a 2-bit example, base station 105-a may define a plurality of thresholds and select a bit value that controls which UEs 115 are eligible for grant-less access to shared channel 320. For example, if the current collision rate is less than the first threshold, the base station 105-a may select a bit value of "11" for the admission control parameter to indicate that any or all of the UEs 115 are eligible for grantless access to the resources of the shared channel 320. If the current collision rate meets or exceeds the first threshold but is less than the second threshold, the base station 105-a may select a bit value of "10" for the admission control parameter to indicate that a first subset of the UEs 115 are eligible for grantless access to the resources of the shared channel 320, but a second subset of the UEs 115 are ineligible. If the current collision rate meets or exceeds the second threshold but is less than the third threshold, the base station 105-a may select a bit value of "01" for the admission control parameter to indicate that only a subset of the first subset of UEs 115 is eligible for unlicensed access to the shared channel 320. If the current collision rate meets or exceeds the third threshold, the base station 105-a may select a bit value of "00" for the admission control parameter to indicate that no UE115 is eligible for admission-free access to the shared channel 320.

In other examples, the base station 105-a may define any number of thresholds and may utilize any number of bits to indicate which UEs 115 are eligible for grant-less access to the shared channel 320. Further, base station 105-a may select or adjust admission control parameters over time based on the detected collision rate to provide less or no grant-free access to resources of shared channel 320 to UEs when the collision rate is high and to provide grant-free access to resources of shared channel 320 to some or all UEs when the collision rate is low.

In some examples, the admission control parameters may prevent access to the resources of the shared channel 320 or enable one or more UEs to access only a portion of the resources of the shared channel 320. For example, the base station 105-a may allocate a portion of the resources of the shared channel 320 for grantless access within one or more sub-TTIs 310, and the admission control parameters may control grantless access to that portion.

At 425, the base station 105-a may transmit the selected admission control parameters to configure the UE115-a with the grantless access threshold. In some examples, the base station 105-a may use one or more different communication layers to inform of the selected admission control parameters. In one example, the base station 105-a may transmit the selected admission control parameters using layer one signaling (such as in the group common control channel 315). Additional aspects of layer one signaling are described below in fig. 5. In another example, the base station 105-a may transmit the selected admission control parameters using layer two signaling (such as in the payload of a downlink shared channel). Additional aspects of layer two signaling are described below in fig. 6. In another example, the base station 105-a may transmit the selected admission control parameters using layer three signaling, such as Radio Resource Control (RRC) signaling. In an example, when using the RRC layer, the base station 105-a may send the selected admission control parameters in an RRC configuration request and may send adjustments to the admission control parameters in some or each RRC reconfiguration request. In such an example, the selected admission control parameters may be considered semi-static, as the selected admission control parameters may remain the same for two or more sub-TTIs.

At 430, the UE115-a may set (e.g., store) the grantless access threshold based at least in part on the admission control parameter received from the base station 105-a at 425. The UE115-a may use the grantless access threshold to determine the eligibility of the UE115-a for grantless access to the resources of the shared channel 320. For example, UE115-a may receive an admission control parameter having a bit value of '01' at 425 and may set a value of the grantless access threshold to the same bit value (e.g., '01') at 430.

At 435, the UE115-a may determine eligibility of the UE115-a for grantless access to the shared channel 320. For example, UE115-a may determine that it has uplink data to send to base station 105-a and may determine whether UE115-a is eligible for grantless access to the resources of shared channel 320. In some examples, the base station 105-a may assign a priority level, a service level, or both to the UEs 115 to indicate which subsets of the UEs 115 are eligible to grant exempt access to the shared channel 320. In an example, the base station 105-a may select a priority level for each of the UEs 115 connected to the base station 105-a and may send a message (not shown in fig. 4) informing each UE115 of its priority level. UE115 may compare its priority level to the grant-less access threshold or may generate a number from its priority level for comparison to the grant-less access threshold to determine whether UE115 is eligible for grant-less access to shared channel 320.

For example, the access control parameter sent at 425 may be two bits, and the base station 105-a may set the priority level for each UE115-a to one of '00', '01', '10', or '11'. UE115-a may compare its assigned priority level to a set value for the grant-less access threshold. In the example, the UE115-a has a priority level of '01', and the UE115-a is eligible for grantless access as long as its priority level meets or is below a grantless access threshold. Thus, a UE115-a with a priority level of '01' is eligible to transmit for a set value of the grant-less access threshold of '01', '10', or '11', but not '00'. In a second example, UE115-a has a priority level of '10', and thus, the UE115-a is eligible to transmit for a setting of the grant-less access threshold of '10' or '11', but not '00' or '01'.

In another example, when establishing a connection with the base station 105-a, each UE115 may negotiate for a particular level of service (e.g., a quality of service (QoS) level), and the base station 105-a may send the level of service to each UE 115. UE115 may compare its service level to the grantless access threshold or may generate a number (e.g., a random or pseudo-random number) from its service level for comparison to the grantless access threshold to determine whether UE115 is eligible for grantless access to shared channel 320. For example, similar to the manner described above, the UE115 may have a service level of one of 00 ',' 01 ',' 10 ', or' 11 ', or may generate a number having a value of one of 00', '01', '10', or '11' based on its service level for comparison with the value set for the grantless access threshold at 430.

In another example, each UE115 may generate a number (e.g., a random or pseudorandom number) that is used as its priority level, and may compare its priority level to a grant-exempt access threshold to determine whether the UE115 is eligible for grant-exempt access to the shared channel 320. For example, similar to the manner described above, UE115-a may generate a number that is one of '00', '01', '10', or '11' for comparison to the value set for the grantless access threshold at 430. The example provided herein is a 2-bit example, but the techniques described herein may be extended to any number of bits.

Operation 440 of fig. 4 corresponds to UE115-a determining at 435 that it is eligible for grantless access to shared channel 320, and operations 445 and 450 correspond to UE115-a determining at 435 that it is ineligible.

in some cases, UE115-a may determine that it is eligible for grantless access at 435 and may transmit using the resources of shared channel 320 without first obtaining a grant from base station 105-a at 440. In some cases, the UE115-a may transmit using all resources of the shared channel 320 in the next sub-TTI or sub-TTIs 310. In another example, the UE115-a may transmit using a portion of the shared channel 320 (e.g., a selected symbol period, REs, REGs, RBs, one or more subcarriers, etc.) within the next sub-TTI or sub-TTIs 310.

In some cases, the UE115-a may determine that it is not eligible for grantless access at 435 and may perform a conventional SR procedure for obtaining a grant from the base station 105-a at 445, as described above. As part of the SR handshake at 445, the base station 105-a may transmit a grant to the UE115-a to allocate resources of the shared channel 320 within the upcoming sub-TTI(s) 310. At 450, the UE115-a may transmit in the resources allocated in the grant using the shared channel 320.

The operations described in fig. 4 may be repeated one or more times. For example, process flow diagram 400 may return to 420 where at 420 base station 105-a may monitor a collision rate within resources of shared channel 320 and may send an adjustment to an admission control parameter to increase or decrease the grantless access threshold at 425.

in some examples, the base station 105-a may send the selected admission control parameters to the UE115-a using layer one signaling. Fig. 5 illustrates example diagrams 500-a, 500-b of an uplink sub-TTI 310 that supports grant-free admission control for a shared channel in accordance with various aspects of the disclosure. The uplink sub-TTI 310-a of figure 500-a is an example of a sub-TTI 310 within the TTI structure 300 of figure 3. The uplink sub-TTI 310-a can include a group common control channel 315-a and an uplink shared channel 320-a. The base station 105-a may transmit the selected admission control parameters within the group common control channel 315-a. In an example, the base station 105-a may transmit the admission control parameters 505-a within the time and frequency resources of the group common control channel 315-a, and the admission control parameters 505-a may be applied to the uplink shared channel 320-a within the same sub-TTI 310-a and not to other sub-TTIs 310-a. In other examples, the selected admission control parameters within the group common control channel 315-a for a particular sub-TTI 310-a may be applied to the uplink shared channel 320-a within a different or multiple other (e.g., a preconfigured number) sub-TTIs 310-a.

In some examples, the group common control channel 315-a occurs within each uplink sub-TTI 310-a of the TTI structure 300 (see fig. 3), and the base station 105-a may adjust the selected admission control parameters to the UE115-a on a sub-TTI by sub-TTI basis. Because the UE115-a receives the selected admission control parameters before each uplink shared channel 320-a, the base station 105-a may dynamically control the admission control parameters of the group common control channel 315-a for the corresponding uplink shared channel 320-a within the same sub-TTI 310-a.

In some examples, the base station 105-a may multicast the admission control parameters by transmitting a single admission control parameter per group of UEs. For example, multiple UEs may monitor the group common control channel 315-a and search for the same admission control parameters. The base station 105-a may assign a common address or identifier to a group of UEs 115 (e.g., UE115-a, UE 115-b), and the UEs 115-a, 115-b within the group may use the common address or identifier to decode the group common control channel 315-a to obtain admission control parameters. Each UE115-a, 115-b within the group may use the same admission control parameters for qualifying the uplink shared channel 320-a for grantless access. In some cases, this may result in collisions when multiple UEs 115-a, 115-b within a group attempt to transmit using the same resources of the uplink shared channel 320-a. As described above, the base station 105-a may monitor the uplink shared channel 320-a for collisions and adjust the admission control parameters accordingly.

the base station 105-a may also monitor the detected collision rate to increase or decrease the number of UEs 115 in a particular group. For example, the group common control channel 315-a may include UE-specific control information, and a particular UE115-a may use its address to decode the resources of the channel 315-a to obtain the UE-specific control information. In some cases, the UE-specific control information may assign the UE to different groups and include group addresses of the different groups. The depicted group common control channel 315-a depicts only a single instance of an admission control parameter within the group common control channel 315-a, but may include two or more admission control parameters, each for each group of UEs 115, for an individual UE115, or both.

In some examples, as shown in diagram 500-a, the base station 105-a may transmit the admission control parameters and the Slot Format Indication (SFI)510-a within the same set of common control channels 315-a. The SFI 510-a may indicate a format of one or more slots (e.g., slot 0, slot 1) of the sub-TTI 310-a. For example, SFI 510-a may indicate a downlink format or an uplink format.

In other examples, as shown in diagram 500-b, the base station 105-a may transmit the admission control parameters and the SFI in different sets of common control channels. The uplink sub-TTI 310-b is an example of a sub-TTI 310 within the TTI structure 300 of FIG. 3. The uplink sub-TTI 310-b can include a first set of common control channels 315-b, a second set of common control channels 315-c, and an uplink shared channel 320-a. In the depicted example, the admission control parameters 505-b may be transmitted within the time and frequency resources of the first set of common control channels 315-b and the SFI 510-b may be transmitted within the time and frequency resources of the second set of common control channels 315-c.

in some examples, the base station 105-a may send the selected admission control parameters to the UE115-a using layer two signaling. Fig. 6 illustrates an example diagram 600 of a downlink sub-TTI 310-c supporting admission control exempt for a shared channel in accordance with various aspects of the disclosure. The downlink sub-TTI 310-c is an example of a sub-TTI 310 from the TTI structure 300 of FIG. 3. The downlink sub-TTI 310-c can include a group common control channel 315-d and a downlink shared channel 320-c (e.g., PDSCH). In some cases, the base station 105-a may transmit the selected admission control parameters 605 within the payload of the downlink shared channel 320-c. The payload may be some or all of the time and frequency resources of the downlink shared channel 320-c for downlink transmission that have been allocated to the UE 115-a. In some examples, the payload may include a Medium Access Control (MAC) Control Element (CE) including the selected admission control parameter 605. In another example, the MAC-CA may be a unicast MAC-CE including the selected admission control parameters.

preferably, examples described herein may provide grant-free access to resources of a shared channel. The base station may monitor the collision rate within the resources of the shared channel. The base station may select and/or adjust admission control parameters that are used to set an admission exempt threshold for controlling which UEs are eligible to transmit within the shared channel resources without first requesting a grant from the base station prior to transmission.

Fig. 7 illustrates a block diagram 700 of a wireless device 705 that supports grant-less admission control of a shared channel in accordance with aspects of the present disclosure. The wireless device 705 may be an example of aspects of a base station 105 as described herein. The wireless device 705 may include a receiver 710, a base station communication manager 715, and a transmitter 720. The wireless device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

Receiver 710 can receive information, such as packets, user data, or control information, associated with various information channels (e.g., control channels, data channels, information, etc., related to grant-less admission control for shared channels). The information may be communicated to other components of the device. The receiver 710 may be an example of aspects of the transceiver 1035 described with reference to fig. 10. Receiver 710 can employ a single antenna or a set of antennas.

The base station communications manager 715 may be an example of an aspect of the base station communications manager 1015 described with reference to fig. 10.

The base station communications manager 715 and/or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware or any combination thereof. If implemented in software executed by a processor, the functions of the base station communication manager 715 and/or at least some of its various subcomponents may be performed by a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure. The base station communications manager 715 and/or at least some of its various subcomponents may be physically located at various locations, including in a distributed fashion such that portions of the functionality are implemented by one or more physical devices at different physical locations. In some examples, the base station communications manager 715 and/or at least some of its various subcomponents may be separate and distinct components in accordance with various aspects of the present disclosure. In other examples, the base station communications manager 715 and/or at least some of its various subcomponents, in accordance with various aspects of the present disclosure, may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

The base station communications manager 715 may select an admission control parameter from a set of admission control parameters, the selected admission control parameter setting a grant-less access threshold for determining eligibility for grant-less access to resources of the shared channel; and transmitting the selected admission control parameters to configure the UE with the grantless access threshold.

The transmitter 720 may transmit signals generated by other components of the device. In some examples, transmitter 720 may be collocated with receiver 710 in a transceiver module. For example, the transmitter 720 may be an example of an aspect of the transceiver 1035 described with reference to fig. 10. The transmitter 720 may use a single antenna or a set of antennas.

Fig. 8 illustrates a block diagram 800 of a wireless device 805 that supports grantless admission control of a shared channel in accordance with aspects of the present disclosure. The wireless device 805 may be an example of aspects of the wireless device 705 or the base station 105 described with reference to fig. 7. The wireless device 805 may include a receiver 810, a base station communication manager 815, and a transmitter 820. The wireless device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

Receiver 810 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, information, etc., related to grant-less admission control for shared channels). The information may be communicated to other components of the device. The receiver 810 may be an example of aspects of the transceiver 1035 described with reference to fig. 10. Receiver 810 can employ a single antenna or a set of antennas.

The base station communications manager 815 may be an example of an aspect of the base station communications manager 1015 described with reference to fig. 10.

the base station communications manager 815 may also include a parameter selector component 825 and a configuration component 830.

Parameter selector component 825 may select an admission control parameter from the set of admission control parameters, the selected admission control parameter setting a grant-free access threshold for determining eligibility for grant-free access to resources of the shared channel. In some cases, the selected admission control parameter increases or decreases the grant-less access threshold. In some cases, the selected admission control parameter includes at least one bit. In some cases, the set of admission control parameters corresponds to a set of different admission exempt access thresholds. The parameter selector component 825 can adjust the alignment control parameters based on the detected collision rate.

Configuration component 830 can transmit the selected admission control parameters to configure the UE with an admission exempt access threshold. In some cases, the grant-exempt access threshold prevents the UE from accessing at least some of the resources of the shared channel. In some cases, the grant-less access threshold allows the UE to access at least some of the resources of the shared channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameters are transmitted on a common control channel. In some cases, the common control channel is common to a group of UEs that includes the UE. In some cases, the selected admission control parameter configures each UE within the group of UEs with an admission exempt access threshold. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted in a common control channel conveying a slot format indication or in a different common control channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted in a payload of a downlink shared channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted using radio resource control signaling. In some cases, configuration component 830 may send the adjusted admission control parameters to configure the UE.

The transmitter 820 may transmit signals generated by other components of the device. In some examples, the transmitter 820 may be collocated with the receiver 810 in a transceiver module. For example, the transmitter 820 may be an example of an aspect of the transceiver 1035 described with reference to fig. 10. The transmitter 820 may use a single antenna or a set of antennas.

Fig. 9 illustrates a block diagram 900 of a base station communications manager 915 that supports grant-less admission control of a shared channel in accordance with aspects of the present disclosure. The base station communications manager 915 may be an example of aspects of the base station communications manager 715, the base station communications manager 815, or the base station communications manager 1015 described with reference to fig. 7, 8, and 10. Base station communications manager 915 may include a parameter selector component 920, a configuration component 925, a collision detector component 930, a priority component 935, and a service component 940. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

Parameter selector component 920 may select an admission control parameter from a set of admission control parameters that sets a grant-free access threshold for determining eligibility for grant-free access to resources of a shared channel. In some cases, the selected admission control parameter increases or decreases the grant-less access threshold. In some cases, the selected admission control parameter includes at least one bit. In some cases, the set of admission control parameters corresponds to a set of different admission exempt access thresholds. In some cases, the parameter selector component 920 can adjust the in-control parameters based on the detected collision rate.

Configuration component 925 can send the selected admission control parameters to configure the UE with the grantless access threshold. In some cases, the grant-exempt access threshold prevents the UE from accessing at least some of the resources of the shared channel. In some cases, the grant-less access threshold allows the UE to access at least some of the resources of the shared channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameters are transmitted on a common control channel. In some cases, the common control channel is common to a group of UEs that includes the UE. In some cases, the selected admission control parameter configures each UE within the group of UEs with an admission exempt access threshold. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted in a common control channel conveying a slot format indication or in a different common control channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted in a payload of a downlink shared channel. In some cases, transmitting the selected admission control parameters further comprises: the selected admission control parameter is transmitted using radio resource control signaling. In some cases, configuration component 925 may send the adjusted admission control parameters to configure the UE.

Collision detector component 930 can detect a collision rate within a resource of a shared channel. In some cases, detecting the collision rate includes: a ratio is determined at which an energy level within resources of the shared channel exceeds an energy threshold. In some cases, the selected admission control parameter is based on a detected collision rate.

Priority component 935 may select a priority level of the set of priority levels for the UE and send the selected priority level to the UE.

serving component 940 may determine a service level of a set of service levels associated with the UE and transmit the determined service level to the UE.

Fig. 10 illustrates a diagram of a system 1000 that includes an apparatus 1005 that supports grantless admission control of a shared channel in accordance with an aspect of the disclosure. The device 1005 may be an example of or include components of the wireless device 705, wireless device 805, or base station 105 as described above (e.g., with reference to fig. 7 and 8). The device 1005 may include components for two-way voice and data communications, including components for sending and receiving communications, including a base station communication manager 1015, a processor 1020, a memory 1025, software 1030, a transceiver 1035, an antenna 1040, a network communication manager 1045, and an inter-station communication manager 1050. These components may be in electronic communication via one or more buses, such as bus 1010. The device 1005 may communicate wirelessly with one or more UEs 115.

The processor 1020 may include intelligent hardware devices (e.g., a general purpose processor, a DSP, a Central Processing Unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof). In some cases, the processor 1020 may be configured to operate the memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1020. The processor 1020 may be configured to execute computer-readable instructions stored in the memory to perform various functions (e.g., functions or tasks to support grantless admission control of a shared channel).

Memory 1025 may include Random Access Memory (RAM) and Read Only Memory (ROM). Memory 1025 may store computer-readable, computer-executable software 1030 comprising instructions that, when executed, cause the processor to perform various functions described herein. In some cases, memory 1025 may contain, among other things, a basic input/output system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Software 1030 may include code for implementing aspects of the present disclosure, including code for supporting grantless admission control of a shared channel. The software 1030 may be stored in a non-transitory computer readable medium such as a system memory or other memory. In some cases, the software 1030 may not be directly executable by a processor, but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

As described above, the transceiver 1035 may communicate bi-directionally via one or more antennas, wired or wireless links. For example, the transceiver 1035 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1035 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

In some cases, the wireless device may include a single antenna 1040. However, in some cases, a device may have more than one antenna 1040 that is capable of concurrently transmitting or receiving multiple wireless transmissions.

The network communication manager 1045 may manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1045 may manage the communication of data communications for client devices, such as one or more UEs 115.

The inter-station communication manager 1050 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communication manager 1050 may coordinate scheduling for transmissions to the UEs 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-station communication manager 1050 may provide an X2 interface within Long Term Evolution (LTE)/LTE-a wireless communication network technology to provide communication between base stations 105.

Fig. 11 illustrates a block diagram 1100 of a wireless device 1105 supporting admission control of a shared channel in accordance with an aspect of the present disclosure. The wireless device 1105 may be an example of aspects of a UE115 as described herein. The wireless device 1105 may include a receiver 1110, a UE communications manager 1115, and a transmitter 1120. The wireless device 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

Receiver 1110 can receive information, such as packets, user data, or control information, associated with various information channels (e.g., control channels, data channels, information, etc., related to grant-less admission control for shared channels). The information may be communicated to other components of the device. The receiver 1110 may be an example of aspects of the transceiver 1435 described with reference to fig. 14. Receiver 1110 can employ a single antenna or a set of antennas.

The UE communications manager 1115 may be an example of aspects of the UE communications manager 1415 described with reference to fig. 14.

the UE communications manager 1115 and/or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the UE communications manager 1115 and/or at least some of its various subcomponents may be performed by a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure. The UE communications manager 1115 and/or at least some of its various subcomponents may be physically located at various locations, including in a distributed manner such that portions of the functionality are implemented by one or more physical devices at different physical locations. In some examples, the UE communications manager 1115 and/or at least some of its various subcomponents may be separate and distinct components in accordance with various aspects of the present disclosure. In other examples, the UE communications manager 1115 and/or at least some of its various subcomponents, in accordance with various aspects of the present disclosure, may be combined with one or more other hardware components, including but not limited to I/O components, transceivers, network servers, another computing device, one or more other components described in the present disclosure, or a combination thereof.

The UE communications manager 1115 may receive admission control parameters from a base station; setting a grant-free access threshold based on the admission control parameter; determining eligibility for obtaining grant-free access to resources of a shared channel based on a grant-free access threshold; and communicating with the base station based on the determined qualification.

The transmitter 1120 may transmit signals generated by other components of the device. In some examples, the transmitter 1120 may be collocated with the receiver 1110 in a transceiver module. For example, the transmitter 1120 may be an example of aspects of the transceiver 1435 described with reference to fig. 14. Transmitter 1120 may use a single antenna or a set of antennas.

fig. 12 illustrates a block diagram 1200 of a wireless device 1205 that supports admission control of a shared channel without admission, in accordance with aspects of the present disclosure. The wireless device 1205 may be an example of an aspect of the wireless device 1105 or UE115 described with reference to fig. 11. The wireless device 1205 may include a receiver 1210, a UE communication manager 1215, and a transmitter 1220. The wireless device 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

receiver 1210 can receive information, such as packets, user data, or control information, associated with various information channels (e.g., control channels, data channels, information, etc., related to grant-less admission control for shared channels). The information may be communicated to other components of the device. The receiver 1210 may be an example of aspects of the transceiver 1435 described with reference to fig. 14. Receiver 1210 can use a single antenna or a set of antennas.

The UE communications manager 1215 may be an example of an aspect of the UE communications manager 1415 described with reference to fig. 14.

The UE communications manager 1215 may also include a parameter component 1225, a threshold selector component 1230, and a qualification component 1235.

Parameter component 1225 can receive admission control parameters from a base station.

Threshold selector component 1230 may set the threshold for grantless access based on admission control parameters.

Qualification component 1235 can determine qualification for obtaining grantless access to resources of the shared channel based upon a grantless access threshold; and communicating with the base station based on the determined qualification.

Transmitter 1220 may transmit signals generated by other components of the device. In some examples, the transmitter 1220 may be collocated with the receiver 1210 in a transceiver module. For example, the transmitter 1220 may be an example of aspects of the transceiver 1435 described with reference to fig. 14. Transmitter 1220 may use a single antenna or a set of antennas.

Fig. 13 illustrates a block diagram 1300 of a UE communications manager 1315 that supports grant-less admission control of a shared channel, in accordance with aspects of the disclosure. The UE communications manager 1315 may be an example of aspects of the UE communications manager 1415 described with reference to fig. 11, 12 and 14. The UE communications manager 1315 may include a parameter component 1320, a threshold selector component 1325, a qualification component 1330, a priority level component 1335, a comparator component 1340, a number generator component 1345, and a service level component 1350. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

Parameter component 1320 may receive admission control parameters from a base station.

Threshold selector component 1325 can set a threshold for grantless access based on admission control parameters.

Qualification component 1330 can determine a qualification for obtaining grantless access to resources of a shared channel based on a grantless access threshold; and communicating with the base station based on the determined qualification.

a priority component 1335 can receive the priority level from the set of priority levels from the base station.

comparator component 1340 can compare the priority level to a threshold of unlicensed access and the random number to a threshold of unlicensed access.

The number generator component 1345 can generate a random number based upon the determined service level. In some cases, determining eligibility for obtaining grant-free access to resources of a shared channel includes: a random number is determined.

The service level component 1350 can determine a service level in the set of service levels.

Fig. 14 illustrates a diagram of a system 1400 that includes an apparatus 1405 that supports grantless admission control of a shared channel in accordance with an aspect of the disclosure. The device 1405 may be an example of the UE115 described above (e.g., with reference to fig. 1) or include components of the UE 115. The device 1405 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a UE communications manager 1415, a processor 1420, memory 1425, software 1430, a transceiver 1435, an antenna 1440, and an I/O controller 1445. These components may be in electronic communication via one or more buses, such as bus 1410. The device 1405 may communicate wirelessly with one or more base stations 105.

Processor 1420 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combinations thereof). In some cases, processor 1420 may be configured to operate the memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 1420. Processor 1420 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks to support grantless admission control of a shared channel).

the memory 1425 can include RAM and ROM. The memory 1425 may store computer-readable, computer-executable software 1430, including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, memory 1425 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

Software 1430 may include code for implementing aspects of the disclosure, including code for supporting grantless admission control of a shared channel. The software 1430 may be stored in a non-transitory computer readable medium such as a system memory or other memory. In some cases, the software 1430 may not be directly executable by a processor, but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

as described above, the transceiver 1435 may communicate bi-directionally via one or more antennas, wired or wireless links. For example, the transceiver 1435 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1435 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission and to demodulate packets received from the antenna.

In some cases, the wireless device may include a single antenna 1440. However, in some cases, a device may have more than one antenna 1440 capable of concurrently transmitting or receiving multiple wireless transmissions.

I/O controller 1445 may manage input and output signals for device 1405. I/O controller 1445 may also manage peripheral devices that are not integrated into device 1405. In some cases, I/O controller 1445 may represent a physical connection or port to an external peripheral device. In some cases, I/O controller 1445 can be implemented using hardware such as Or other known operating systems. In other cases, I/O controller 1445 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I/O controller 1445 may be implemented as part of a processor. In some cases, a user may interact with device 1405 via I/O controller 1445 or via hardware components controlled by I/O controller 1445.

Fig. 15 shows a flow diagram illustrating a method 1500 for grant-less admission control of a shared channel, in accordance with aspects of the present disclosure. As described herein, the operations of method 1500 may be implemented by base station 105 or components thereof. For example, the operations of method 1500 may be performed by a base station communications manager as described with reference to fig. 7-10. In some examples, the base station 105 may execute sets of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

At block 1505, the base station 105 may select an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grant-less access threshold for determining eligibility for obtaining grant-less access to resources of a shared channel. The operations of block 1505 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1505 may be performed by a parameter selector component as described with reference to fig. 7-10.

At block 1510, the base station 105 may send selected admission control parameters to configure the UE with an admission exempt access threshold. The operations of block 1510 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1510 may be performed by a configuration component as described with reference to fig. 7-10.

fig. 16 shows a flow diagram illustrating a method 1600 for grant-less admission control of a shared channel, in accordance with aspects of the present disclosure. As described herein, the operations of method 1600 may be implemented by a base station 105 or components thereof. For example, the operations of method 1600 may be performed by the base station communications manager described with reference to fig. 7-10. In some examples, the base station 105 may execute sets of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station 105 may use dedicated hardware to perform aspects of the functions described below.

at block 1605, the base station 105 may select an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting an admission exempt access threshold for determining eligibility for obtaining admission exempt access to resources of the shared channel. The operations of block 1605 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1605 may be performed by a parameter selector component as described with reference to fig. 7-10.

At block 1610, the base station 105 may send selected admission control parameters to configure the UE with a grant-exempt access threshold. The operations of block 1610 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1610 may be performed by a configuration component as described with reference to fig. 7-10.

At block 1615, the base station 105 may detect a collision rate within the resources of the shared channel. The operations of block 1615 may be performed according to methods described herein. In certain examples, aspects of the operations of block 1615 may be performed by an impact detector assembly as described with reference to fig. 7-10.

At block 1620, the base station 105 may adjust an admission control parameter based at least in part on the detected collision rate. The operations of block 1620 may be performed according to methods described herein. In some examples, aspects of the operations of block 1620 may be performed by a parameter selector component as described with reference to fig. 7-10.

at block 1625, the base station 105 may send the adjusted admission control parameters to configure the UE with the adjusted admission control parameters. The operations of block 1625 may be performed according to methods described herein. In some examples, aspects of the operations of block 1625 may be performed by a configuration component as described with reference to fig. 7-10.

fig. 17 shows a flow diagram illustrating a method 1700 for grant-less admission control of a shared channel, in accordance with an aspect of the present disclosure. As described herein, the operations of method 1700 may be implemented by UE115 or components thereof. For example, the operations of method 1700 may be performed by the UE communications manager described with reference to fig. 11-14. In some examples, the UE115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE115 may use dedicated hardware to perform aspects of the functions described below.

At block 1705, the UE115 may receive admission control parameters from a base station. The operations of block 1705 may be performed according to methods described herein. In some examples, aspects of the operations of block 1705 may be performed by a parameter component as described with reference to fig. 11-14.

At block 1710, the UE115 may set a threshold for grantless access based at least in part on the admission control parameter. The operations of block 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of block 1710 may be performed by a threshold selector component as described with reference to fig. 11-14.

At block 1715, the UE115 may determine eligibility for obtaining grantless access to resources of the shared channel based at least in part on a grantless access threshold. The operations of block 1715 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1715 may be performed by the qualification component as described with reference to fig. 11-14.

At block 1720, the UE115 may communicate with the base station based at least in part on the determined eligibility. The operations of block 1720 may be performed according to methods described herein. In some examples, aspects of the operations of block 1720 may be performed by a qualification component as described with reference to fig. 11-14.

Fig. 18 shows a flow diagram illustrating a method 1800 for grantless admission control of a shared channel in accordance with an aspect of the present disclosure. As described herein, the operations of method 1800 may be implemented by UE115 or components thereof. For example, the operations of method 1800 may be performed by the UE communications manager described with reference to fig. 11-14. In some examples, the UE115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE115 may use dedicated hardware to perform aspects of the functions described below.

At block 1805, the UE115 may receive admission control parameters from a base station. The operations of block 1805 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1805 may be performed by a parameter component as described with reference to fig. 11-14.

At block 1810, the UE115 may set a threshold for grantless access based at least in part on the admission control parameter. The operations of block 1810 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1810 may be performed by a threshold selector component as described with reference to fig. 11-14.

At block 1815, the UE115 may receive a priority level of the plurality of priority levels from the base station. The operations of block 1815 may be performed according to methods described herein. In some examples, aspects of the operations of block 1815 may be performed by the qualification component, the comparator component, or both as described with reference to fig. 11-14.

At block 1820, the UE115 may determine eligibility for obtaining grant-free access to resources of the shared channel based at least in part on comparing the priority level to a grant-free access threshold. The operations of block 1820 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1820 may be performed by the qualification component, the comparator component, or both as described with reference to fig. 11-14.

at block 1825, the UE115 may communicate with the base station based at least in part on the determined eligibility. The operations of block 1825 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of block 1825 may be performed by the qualification component as described with reference to fig. 11-14.

It should be noted that the above described methods describe possible implementations and that the operations and steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more methods may be combined.

The techniques described herein may be used for various wireless communication systems such as code division multiple access (CMDA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and others. The terms "system" and "network" are often used interchangeably. Code division multiple access (CMDA) systems may implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 release may be commonly referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes wideband CDMA (W-CDMA) and other variants of CDMA. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM).

The OFDMA system may implement wireless technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, NR, and GSM are described in documents from an organization named "3 rd Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "3 rd generation partnership project 2" (3GPP 2). The techniques described herein may be used for the systems and wireless techniques mentioned above as well as other systems and wireless techniques. Although aspects of an LTE or NR system may be described for purposes of illustration, and LTE or NR terminology may be used in much of the description, the techniques described herein may be applied beyond LTE or NR applications.

in LTE/LTE-a networks, including such networks described herein, the term evolved node (eNB) may be used generically to describe a base station. The wireless communication system or systems described herein may include heterogeneous LTE/LTE-a or NR networks where different types of enbs provide coverage for various geographic areas. For example, each eNB, next generation node b (gnb), or base station may provide communication coverage for a macro cell, a small cell, or other type of cell. The term "cell" can be used to describe a base station, a carrier or component carrier associated with a base station, or a coverage area (e.g., sector, etc.) of a carrier or base station, depending on the context.

A base station may include, or may be referred to by those skilled in the art as, a base transceiver station, a radio base station, an access point, a radio transceiver, a node B, an evolved node B (enb), a gNB, a home node B, a home evolved node B, or some other applicable terminology. The geographic coverage area for a base station can be divided into sectors that form a portion of the coverage area. One or more wireless communication systems described herein may include different types of base stations (e.g., macro cell or small cell base stations). The UEs described herein are capable of communicating with various types of base stations and network devices, including macro enbs, small cell enbs, gbbs, relay base stations, and so forth. There may be overlapping geographic coverage areas for different technologies.

a macro cell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider. A small cell is a lower power base station than a macro cell, which may operate in the same or different (e.g., licensed, unlicensed, etc.) frequency band as the macro cell. Small cells may include pico cells, femto cells, and micro cells according to various examples. For example, a pico cell may cover a smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider. A femto cell may also cover a smaller geographic area (e.g., a home) and may provide restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in the home, etc.). An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. An eNB may support one or more (e.g., two, three, four, etc.) cells (e.g., component carriers).

One or more of the wireless communication systems described herein may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. The techniques described herein may be used for synchronous or asynchronous operations.

The downlink transmissions described herein may also be referred to as forward link transmissions, while the uplink transmissions may also be referred to as reverse link transmissions. Each of the communication links described herein (including, for example, the wireless communication systems 100 and 200 of fig. 1 and 2) may include one or more carriers, where each carrier may be a signal made up of multiple subcarriers (e.g., waveform signals of different frequencies).

The description set forth herein describes example configurations in connection with the figures and is not intended to be exhaustive or of all examples that may be implemented or within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," and is not "more preferred" or "advantageous over other examples. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label, regardless of the second reference label.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. Such as in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hard wiring, or any combination of these. Features implementing functions may also be physically located at various locations, including in a distributed fashion where portions of the functions are implemented at different physical locations. Further, as used herein and including in the claims, the use of "or" (e.g., a list of items ending with a phrase such as "at least one of" or one or more of ") in a list of items indicates an inclusive list, e.g., a list of at least one of A, B or C means a or B or C or AB or AC or BC or ABC (i.e., a and B and C). Further, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, example steps described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on".

Computer-readable media includes both non-transitory computer storage media and communication media, and communication media includes any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can comprise RAM, ROM, electrically erasable programmable read-only memory (EEPROM), Compact Disc (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Further, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication, comprising:

selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining granualtion of a resource of a shared channel; and

Transmitting the selected admission control parameters to configure a User Equipment (UE) with the grantless access threshold.

2. The method of claim 1, wherein selecting the admission control parameter comprises:

Detecting a collision rate within the resources of the shared channel, wherein the selected admission control parameter is based at least in part on the detected collision rate.

3. The method of claim 2, wherein detecting the collision rate comprises:

Determining a ratio at which an energy level within the resources of the shared channel exceeds an energy threshold.

4. The method of claim 1, further comprising:

detecting a collision rate within the resources of the shared channel;

Adjusting the admission control parameter based at least in part on a detected collision rate; and

Transmitting the adjusted admission control parameters to configure the UE with the adjusted admission control parameters.

5. The method of claim 1, wherein:

The selected admission control parameter causes the grant-less access threshold to be increased or decreased.

6. The method of claim 1, wherein:

The grant-exempt access threshold prevents the UE from accessing at least some of the resources of the shared channel.

7. the method of claim 1, wherein:

The grant-free access threshold allows the UE to access at least some of the resources of the shared channel.

8. The method of claim 1, wherein transmitting the selected admission control parameter further comprises:

the selected admission control parameters are transmitted on a common control channel.

9. The method of claim 8, wherein:

The common control channel is common to a group of UEs including the UE.

10. the method of claim 9, wherein:

The selected admission control parameter configures each UE within the group of UEs with the grantless access threshold.

11. The method of claim 1, wherein transmitting the selected admission control parameter further comprises:

The selected admission control parameter is transmitted in a common control channel conveying a slot format indication or in a different common control channel.

12. The method of claim 1, wherein transmitting the selected admission control parameter further comprises:

The selected admission control parameter is transmitted in a payload of a downlink shared channel.

13. The method of claim 1, wherein transmitting the selected admission control parameter further comprises:

The selected admission control parameter is transmitted using radio resource control signaling.

14. The method of claim 1, wherein:

the selected admission control parameter comprises at least one bit.

15. The method of claim 1, wherein:

The plurality of admission control parameters correspond to a plurality of different admission exempt access thresholds.

16. The method of claim 1, further comprising:

Selecting a priority level for the UE from a plurality of priority levels; and

Transmitting the selected priority level to the UE.

17. The method of claim 1, further comprising:

Determining a service level for the UE from a plurality of service levels; and

Transmitting the determined service level to the UE.

18. A method for wireless communication, comprising:

Receiving an admission control parameter from a base station;

Setting a grantless access threshold based at least in part on the admission control parameter;

Determining eligibility for obtaining exempt access to resources of a shared channel based at least in part on the exempt access threshold; and

Communicating with the base station based at least in part on the determined eligibility.

19. The method of claim 18, wherein determining eligibility for obtaining grant-free access to the resources of the shared channel comprises:

Receiving a priority level of a plurality of priority levels from the base station; and

Comparing the priority level to the grant-less access threshold.

20. the method of claim 18, wherein determining eligibility for obtaining grant-free access to the resources of the shared channel comprises:

Determining a random number; and

Comparing the random number to the grant-less access threshold.

21. the method of claim 20, wherein determining the random number comprises:

Determining a service class of a plurality of service classes; and

Generating the random number based at least in part on the determined service level.

22. An apparatus for wireless communication, comprising:

Means for selecting an admission control parameter from a plurality of admission control parameters, the selected admission control parameter setting a grantless access threshold for determining eligibility for obtaining grantless access to resources of a shared channel; and

Means for transmitting the selected admission control parameters to configure a User Equipment (UE) with the grantless access threshold.

23. The apparatus of claim 22, wherein the means for selecting the admission control parameter comprises:

Means for detecting a collision rate within the resources of the shared channel, wherein the selected admission control parameter is based at least in part on the detected collision rate.

24. The apparatus of claim 22, further comprising:

Means for detecting a collision rate within the resources of the shared channel;

Means for adjusting the admission control parameter based at least in part on a detected collision rate; and

Means for transmitting the adjusted admission control parameters to configure the UE with the adjusted admission control parameters.

25. The apparatus of claim 22, wherein:

26. The apparatus of claim 22, wherein:

27. The apparatus of claim 22, further comprising:

Means for selecting a priority level for the UE from a plurality of priority levels; and

Means for transmitting the selected priority level to the UE.

28. The apparatus of claim 22, further comprising:

Means for determining a service class for the UE from a plurality of service classes; and

Means for transmitting the determined class of service to the UE.

29. An apparatus for wireless communication, comprising:

means for receiving admission control parameters from a base station;

Means for setting an admission control parameter based at least in part on the received grant control information;

Means for determining eligibility for grantless access to resources of a shared channel based at least in part on the grantless access threshold; and

means for communicating with the base station based at least in part on the determined eligibility.

30. The apparatus of claim 29, wherein the means for determining eligibility for obtaining grant-free access to the resources of the shared channel comprises:

means for receiving a priority level of a plurality of priority levels from the base station; and

Means for comparing the priority level to the grant-free access threshold.